You can include the Note syntax but you can't get the Note toolbar item. So you'd have to switch over to the dokuwiki editor, insert your note and then switch back. An easy way to switch to dokuwiki's editor is with the dwedit plugin, written by one of fckgLite's users. See
https://www.dokuwiki.org/doku.php?id=plugin:fckg#direct_action_link_to_dokuwiki_editor. But this requires the dokuwiki template.